When you add music to your training, by definition you have added extra sensory input; an additional element.
Depending on where you are, who you are with, what you are doing, and what the objective is, the addition of music can have both positive and negative effects.
If you’re doing a group metcon, the music probably serves to unify and intensify the experience.
If you’re going for a max of five single snatches, the music could meddle with your need to focus intensely.
Let me put it another way. I train alone, in my garage. The music is most often off because my kids are sleeping upstairs.
Whenever I get the chance to blast some hard rock or rap during an afternoon workout, I do …
… unless it’s distracting me from focusing on an important set of lifts.
How do you know? If you find yourself messing with your playlist, device, or headphones instead of visualizing making the lift, then, you’ve become distracted.
If you’ve never tried working out in silence, with nothing but the sound of your own breath, you might be surprised how intense that can be.
You might even find that there’s nothing more that music can add sometimes.